Boeing officially activated its fourth 737 MAX final-assembly line, the $1 billion North Line, at its Everett, Washington plant on 6 July 2026, marking the first time the single-aisle jet is built outside Renton. The facility enters low-rate initial production to validate build processes before contributing to the program’s target of 52 aircraft per month by early 2027. This geographic diversification addresses a backlog exceeding 4,300 orders and stabilizes the supply chain against Renton capacity constraints. While current output sits at 47 jets monthly, the North Line will initially focus on MAX 8 and 9 variants, with MAX 10 production pending FAA certification expected late 2026. The expansion utilizes space vacated by the 747 and relocated 787 programs, securing long-term industrial breathing room for the sector.